OHA Drinking Water Services
OR41
PWS ID: 94441 ---- TREE TOP
Lead & Copper

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90th Percentile Summary Results

Sample Dates Date
Received		 Sample
Count		 Frequency Lead
(mg/L)		 Copper
(mg/L)		 Consumer
Notice Date
9/8/2020  9/18/2020 5 3 years 0.0038 0.436
9/25/2017  10/4/2017 5 3 years 0.0050 0.445
9/21/2014  10/9/2014 5 3 years 0.0010 0.360
8/28/2011  9/12/2011 5 3 years 0.0030 0.552
11/22/2010  1/4/2011 5 3 years 0.0060 0.460
12/4/2007  1/3/2008 5 3 years 0 1.155
12/14/2004  12/27/2004 5 3 years 0 0.230
1/1/1997  -  7/8/19978/28/1997 5 1 year 0 0.198
1/1/1996  -  8/16/19969/30/1996 5 1 year 0 0.213
1/1/1995  -  9/14/199511/9/1995 5 1 year 0.0014 0.305
1/1/1995  -  2/24/199511/9/1995 5 6 months 0.0015 0.140
7/1/1994  -  11/16/199411/9/1995 5 6 months 0.0010 0.100


More information for this water system: SDWIS ID 2236
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